Bomag Belleville Spring | Part 05815094

The Bomag 05815094 Belleville Spring is a genuine OEM component designed for Bomag BW 131, BW 135, and BW 138 series tandem rollers. Sourced directly from Bomag, this spring delivers the exact geometry, load rating, and material grade specified for these machines. This Belleville Spring is a direct-fit replacement that installs without modification, restoring correct clamping or tensioning force to the assembly it serves. Confirmed fitment spans a wide range of tandem roller variants, including the BW 131 AD-2, BW 131 AD-3, BW 131 AD-5, BW 131 ACW-2, BW 131 ACW-3, BW 131 ACW-5, BW 135 AC, BW 135 AD, BW 135 AD-5, BW 138 AC, BW 138 AC-5, BW 138 AD, BW 138-AD, BW 138 AD-5, BW 125 ACH, and BW 125 ADH.

Key Features

• Genuine OEM Spring Rate — manufactured to Bomag's exact deflection and load specifications, ensuring the spring performs precisely as the original design requires
• Direct-Fit Replacement — matches the original seat diameter, free height, and cone angle so this Belleville Spring seats correctly in the original bore or stack without reworking surrounding components
• Broad Tandem Roller Coverage — fits BW 131, BW 135, and BW 138 series tandem rollers across multiple generation variants, including AC, AD, ACH, ADH, and ACW configurations
• Sustained Clamping Force — a correctly rated Belleville Spring maintains consistent axial load over extended service cycles; a fatigued or collapsed spring causes loss of preload, leading to vibration, slippage, or premature wear in the connected assembly
• OEM Part Number Traceability — part number 05815094 cross-references directly in Bomag's parts catalog, so you can confirm the correct application before ordering

A Belleville Spring — sometimes called a disc spring or conical washer — is a precision-engineered washer that generates a controlled axial clamping or preload force when compressed. In tandem roller applications, these springs are commonly used in brake assemblies, vibration drive couplings, and tensioning systems where a compact, high-load spring element is needed in a tight axial space. When a Belleville Spring loses its temper, cracks, or flattens from fatigue, the assembly it supports loses its designed preload, which can result in slippage, inconsistent braking, or accelerated wear on mating components — making timely replacement essential to keeping the roller operating correctly.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

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